Hmm...
I actually like Bark better but I like Jake's solo work on Sin better.
Bark is a little keyboard heavy but I like the overall feel and darker tone of that album. For me it's more in line with what Ozzy was doing with RR.
In general I think the songs are consistent on Sin and but didn't particularly like his tone. In fact tone wise Jake isn't very high up there with me but again, his playing is fantastic on Sin. Sin to me is Ozzy doing the LA Hair Metal thing.
Btw/ not a fan of the mix on either album. Bark is a bit dark whereas TUS is very Ron Nevison, almost flat sounding. Put on anything at that time with Nevison and it has that sound i.e. Survivor, Heart, Ozzy, Kiss, Europe etc... Some not bad by any means just very Nevison, especially Sin with that flat sound. Now with Bark they had issue's with the mix but Sharon was in a rush to get the album to the label and wouldn't let Norman, Daisley and Lee remix it. Jake would sign over all his rights soon after.
Overall I think the highs outweigh the negative on Bark whereas TUS never reaches those highs but maybe more consistent albeit weaker in general. Still the highs of Bark outweigh TUS for me.