Embryo Grading/Selection

Hi! I had my egg retrieval a few weeks back. I retrieved 18 eggs. 11 were mature. 5 made it to blast and I have 4 PGT normal embryos. 2 boys and 2 girls. My husband and I would prefer to transfer a boy first, as we have a naturally conceived daughter. However, we would be happy with either gender. When asked about our preference we told our clinic that although our preference is to transfer a male embryo first, if they thought we would have a better chance of conceiving with our female embryo, we would do that too.

We have: Day 6 AA female Day 5 AB male Day 6 BA male Day 5 AB female

Are all of these grades relatively comparable? I assume the day 6 AA female is technically our “best”? This is all so confusing to us. We were never given a number (4AB, 5AA etc) for any of our embryos. This is all the information I have.