Regarding tren ace versus enanth dosing, here is the mgs base per 100mg for testosterone:
Test Acetate-87mg/100mg
350mg Test Ace=304.5mg Test Base
Test Enanthate-72mg/100mg
500mg Test Enanth=360mg Test Base
450mg Test Enanth=324mg Test Base
I've never seen Test Acetate in my life, but these numbers are handy.
MW for test base is ~288 versus 270 for tren, so pretty negligible difference IMO.
So honestly, I think 400mg/wk of enanth should be similar to 350mg/wk of acetate with tren. 500mg of enanth is definitely more tren than 350mg of ace IMO.
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As others have pointed out, don't get cocky early in your tren cycle. It takes ~4 half lifes to reach steady state (with any steroid) if you are pinning tren e at approximately the 1/2 life mark (7-9 days or weekly). So it will be a good month before you hit maximal tren levels doing 400mg/wk of tren e once weekly, and then it will be a good 2 weeks after your last shot before it wears off completely.
Tren's funny how it can boost your libido early on, but for most people, it seems to take a severe nose dive after a few weeks (sometimes even with test, caber, etc; YMMV).
It is definitely an awesome steroid, but you have to wield that mofo carefully, like a samurai sword or you might get sliced. I've been bridging tren ace to enanth lately to speed things along, and my threshold for irritation is decreasing rapidly.
Also as someone said, Test/Tren/EQ = a great stack (my current one).