If you read through the whole thread you will see that some people go down a half size, some go up a half size and the majority use the same size Mako vs. Bauer or CCM. Nothing will replicate trying them on and baking them. We can only relay our personal experiences.
I wear an 8EE Mako and baked an 8D to see if it would expand enough for my forefoot. The 8D was still too tight in the forefoot after baking (it was fine in the mid-foot and heel). I tried on an 8EE Supertacks (did not bake them) and they were too tight in the forefoot and my toes weren't brushing the cap like they do in Makos (the heel was locked and I measure an 8 on the CCM Brannock though. It felt like they were just a touch longer than Makos though). I demoed Supremes back in the TotalOne days and 7.5EE fit lengthwise, but I had a bit of heel lift. I haven't tried new Supremes.
Based on my experiences, I think someone who takes a D width Supertacks would want a D width Mako. The only D width skate that would translate into a EE Mako would be a Nexus (which has more than enough room in the forefoot for me, but is sloppy in the heel). As for length, if your feet are right up against the cap in Supertacks, then going up a half size in Makos probably makes sense, but if you're a bit off the cap in Supertacks, stick with the same size.