hot bodies diffs

hi all...thanks guys, spiral cut gears eh? sounds interesting, spiral cut should be stronger, more than one tooth engaged at any time- it should take more power, if cut correctly that is . i know it would deflect at a different angle but cant see why the bearings would go quicker? same power same wear factor?? oh well now i cant decide between the two, spiral should be better thats why they were designed,
same power down a smaller lighter diff