I'm looking at buying some 3m Perfect it III machine glaze and rubbing compound. I've never used their Perfect it III line, but I have used the rubbing compound and machine polish in the 3m Perfect it II line and liked them well. Do the Perfect it III polishes and compounds work better than the II line? 3m says they are formulated to reduce splatter and are easier to clean out of crevices, but are they really worth the extra money? BTW, I'll be using the products by rotary. I've seen some reviews of the III line on the board and product review page, but nothing much that directly compares the products between the II and III lines. Thanks for any info you all have!