Is your SD-1 MIJ or MIT? It's not the place, it's the time (and the chips)

I had a newer DS-1 that I A/B'd with a friend's old MIJ DS-1 and the old ones definitely were warmer, I'm guessing the SDs are the same. I did a few tweaks to my SD-1 and with an amp that's already running hot, it makes it get really thick! I'm guessing it doesn't take more than a couple $ worth of parts to get the new ones sounding killer too. MXR probably did a few tweaks to the Wylde over the original circuit, just would be curious how it would sound next to an old SD-1.