I've tried and had good luck with both, but I'll share my experiences
Arimistane (oral) - not bad, dried my joints out all to $h!t after 50mg. Leaning out effect, looked more vascular. I did notice a slight down-tick in libido,so maybe it was also affecting my estrogen. No way to prove that's what caused libido issues, but it's the only thing at the time that was different. Cannot remember brand (repp sports i think), but there are plenty of options on the market if you really want the oral version.
Musclegelz Estrozone (arimistane transdermal) - good pumps, dried me out very well, affected my sleep somewhat, noticed more libido (once again, no way to really prove this product was the cause)
AET50 from Apex alchemy - good pumps, improved sleep quality, better libido, dried me out though not as much as the TD arimistane.
Suppress C from XPG - same as AET50
All things considered, I'd personally give the edge to AET50 and Suppress C. It is more well rounded in my opinion. I have used each of these b-aet products enough to know they directly impacted those qualities of life (sleep, libido, stress, etc). If I used arimistane again, it would for sure be the transdermal version.