Need help in picking Ferris ZTR engine

[whitetail]

I'm close to making up my mine on a mower..Ferris IS1500Z,now comes the engine/deck size.Ferris has priced the 52" 25hp Kawasaki over $1000. more than the 48''/21hp Kawasaki...but when it comes to the 44" deck and 19Hp there is only about $200. difference . What am I missing here?? they weight about the same except for deck size. where does the extra money come in when purchaseing the 25Hp with 52" deck? Thanks

[Travis Followell]

I would say that the price difference is coming from the engine because fron the 44 to the 48 only increases by 2 hp but from the 48 to the 52 increases by 4 hp.