Hey all, I'm just wondering if there is any major difference between the two pedals in the title, the Maxon OD-9 and the OD9 Pro+. For example, is the OD-9 Pro + essentially just an OD-9 with the Boost option giving it a larger range of sounds? Also an unrelated question for you EHX guys out there, is there any difference in sound quality between the Nano Line of products and full size pedals, or is the only difference in size? I was debating on either a small stone phaser or a nano small stone. If it helps any, i play mostly classic rock.