The slightly distorted dots of the T1/H1 are mainly visible if you throw a magnifier behind it. The change of the circuitry of the next generation T2/H2 models moves to solve this, the same circuitry is in the Aimpoint Pro if you want a larger tube). I have no experience with the MRO, but have used M2/gen 1&2 micros which I like. I do like the smaller size of the micro as I do run a magnifier behind it and it gives me more rail space, but I suspect that is not really a consideration for you.
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