I have like six different dsp carts, and the dsp chip is similar if not identical in appearance in all of them (except the dsp-2 in F1ROC, which looks like ST010 or ST011 on that page.)
I also just opened oshaberi parodius, and it has a very similar board design with the same 4 chips.
One last bit of proof (other than scanning mine) is the picture here, scroll down, it's the one that says sa-1. You can tell that's a scan of the japanese mario RPG because the rom chip says ARWJ-0, mine says ARWE-0. You can look at the dsp pic, that's what all the dsp chips I've seen look like (the top chip.)
I hope I've been able to prove myself not wrong. I hate seeing wrong info spread, especially about snes and snes special chips :)