Two quotes, two different totals, and no clear reason why
You've got two pieces of paper on the kitchen table, both for replacing the same air conditioner, and the numbers aren't close. Maybe it's a $2,000 gap, maybe more. The tonnage is the same. The brand names are similar enough. Your first instinct is to assume someone is padding the bill or someone is cutting corners, and you want to know which.
That instinct is right, but the answer is almost never in the big number at the top. It's in a handful of line items that one contractor included and the other didn't bother to write down. In a place like Springfield, where houses range from 1950s brick ranches in Rountree to newer builds out toward Nixa and Ozark, those missing lines matter more than they would in a market full of identical tract housing.
Start with the ductwork, because this region is hard on it
A lot of Springfield homes still have original ductwork from whenever the house was built, especially in the older neighborhoods near downtown and around Galloway. Humid summers and attic temperatures that swing hard between a January cold snap and a July heat wave put real stress on duct seals and insulation over decades. If one quote includes duct inspection, sealing, or modification and the other doesn't mention ducts at all, that's not a small omission. A new high-efficiency unit pushing air through leaky 40-year-old ducts will underperform no matter how good the equipment is.
You can check this yourself before anyone shows up. Go into the attic or crawlspace with a flashlight and look at the duct joints. Flaking silver tape, gaps you can see daylight through, or ducts that have come loose from a register are all things worth photographing and asking both contractors about directly.
More on this from The Lines Two Air Conditioning Quotes Do Not Share.
Load calculations versus guesswork
A proper quote should be based on a load calculation for your specific house, not just a swap of whatever tonnage is currently installed. Springfield's housing stock is mixed enough, brick ranches, newer vinyl-sided two-stories, older farmhouses on the edges of town, that square footage alone tells you very little. Insulation levels, window count, and which direction the house faces all change what size unit actually fits.
If one quote lists a Manual J calculation or something equivalent and the other just says
ask the second contractor how they arrived at the number. A unit that's oversized will cycle on and off too fast and never pull humidity out of the air properly, which in a Missouri summer means a house that feels clammy even when the thermostat says it's cool enough.
Permits, disposal, and the warranty paperwork
Springfield and the surrounding municipalities require permits for AC replacement, and that process includes an inspection. A quote that skips the permit fee isn't necessarily hiding something, but it's worth asking whether that cost is rolled in elsewhere or simply not included, because you'll need it eventually either way.
Same with disposal of the old unit and the refrigerant in it. Older systems may still hold R-22, which has to be recovered and handled under EPA rules, not just drained. That's a real cost that shows up on one quote and vanishes from the other.
Warranty registration is the other quiet one. Most manufacturers require the installing contractor to register the equipment within a set window after installation, or the warranty defaults to a much shorter base period. If a quote doesn't mention who handles registration, ask. It's a five-minute task that protects you for the next decade.
What a homeowner can reasonably judge, and what needs a trained eye
You can compare brand, tonnage, SEER rating, and the presence or absence of the items above. You can walk your attic and look at your ducts. You can ask straightforward questions and expect straightforward answers, not a brochure.
What you can't reasonably judge from the kitchen table is whether a load calculation was done correctly, whether the refrigerant line set sizing matches the new unit, or whether the electrical disconnect and breaker match the equipment's actual draw. Those require someone who has actually been inside the attic crawlspace in July and knows what a Springfield summer does to equipment that was sized wrong from the start.
When two quotes diverge sharply, the honest move is to go back to both contractors with the specific missing line items and ask them to explain the gap in writing. A contractor who can walk you through the difference is worth more than the one with the lower number and no explanation.