Depending on the manufacturer, many 40' coaches are actually 40 feet 10 inches; and in reverse, many 43' coaches are actually 42 feet 10 inches. Look up the actual length.
The other factor is the wheel base and turning radius. Some 43' tag axle coaches will pick up the tag at slow speed making tight turns and the coach will pivot on the main rear drive axle thus making a tighter turn radius than a 40' or even 38' non tag coach.
Get the coach you and your wife like the best and forget about the length.
97 Monaco Windsor- Sold
07 Monaco Executive McKinley- Sold
04 Monaco Signature Chateau IV