After 13 years with a Craftsman dyt 4000/ Intek I also was hard against Briggs because of pushed guide and overheating . But I also wanted the locking diff and finally overcame the bias because my reading and talking to the local Husky dealer about Kaw engines. They push guides too even on the commercial units. So I bought the Intek/locking diff combo last July (Husky GT48XLSi). With only 45 hours it is too soon to comment on the Intek Endurance engine which may be assembled on a different line than most big box stuff (If Sears is big box they are showing the Platinum Intek at a competitive price , but without the locker). The new Intek does hold 5w 30 better than the old Intek which threw it out ( no smoke) past the rings from new. There is another current Husky with a limited slip similar to some automotive units which senses loss of traction and works automatically (no manual switch).
I rave on in another thread about the new Husky. I do like the electric switch actuated locking diff. Yesterday I pulled out a dying landscape tree with a chain. It spun and I went easy, but finally out.