All of your tractors will have a 6-7 hp difference to the pto, depending upon transmission type. As far as weight goes, I have the Ck30 hst and ive needed every bit of its weight almost constantly. My loader picks my tractor right off the ground, even with a 500 lb boxblade on the back. Unless your using the tractor for strictly lawn mowing , youll be glad you have the weight.. I love this tractor, im approaching my 50 hr service and youd be amazed at what its done..