I think T levels on equivalent doses would be similar. I actually had too high blood levels from t-cream, and had to cut my dose down. I've heard this from other people so this is not unheard of. I think quite a lot of people start on gel on quite a low dose and continue that way makes comparing the gel vs IM pretty hard. (I don't know re: the patch, but that is also an even dose that is topical, it's more which you'd prefer, I've heard a high percentage of skin irritation problems, but if you didn't have this issue, it might be pretty sweet.)
--Jay