Tamoxifen Vs Anastrozole

Have been on TRT for almost 3 yrs.
Long story short, likely had low T entire life, just got proactive about it too late.
With TRT comes sides. Ive always had issue with moderate gyno prior to TRT.
E levels went up and have been on/off, now on again with the tamoxifen for residual gyno.
My Q? Is anastrozole better than tamoxifen for wiping out excess E? Dr wont even mention
Arimidex, says tamox serves same purpose. From reading, seems arimdex
Is more efficient as an AI and may not jeopardize T level integrity?