2ce is VERY different from 2cb.
Much more visual, much bigger body load, but can be much more rewarding if you have a great trip.
I have a great deal of respect for 2ce, it's a powerful substance, but by far my favourite.
And as for advice I would start around 15mg, I personally go for 25 each time but I love being blasted off of my ass, and given how the 2c family especially reacts differently for everyone, start around 15.
You can always take more but you can't get it out of your system once you take it.