The pink muc off stuff is fine if you apply it carefully/sparingly at the end of a ride so it has time to dry before next use. Definitely runs cleaner than the blue and my entirely unscientific, anecdotal evidence suggests a bottle lasts longer which offsets the price. You do get some gunk build up over time but it’s far and away the cleanest lube I’ve found that is able to take a 50 mile ride in the mix of wet sand and heavy chalky mud we tend to get round here.
I’ve found I like the green in the drier months. Runs nice and clean and seems to be less finicky than other dry lubes about a completely clean chain before applying (although that certainly helps) which means it’s easier to go back to wet for a few rides in the height of ‘summer’.
The yellow on the other hand has only one redeeming feature, which is how clean it runs. I’m pretty sure that’s because it doesn’t actually put anything on the chain. I gave it a second chance last summer because I reasoned there was no point spending the extra money on the green one if I didn’t need to, but after several rides of it failing to make it all the way round, the final straw was when I had to stop to buy some after 30 miles as the squeaking was driving me insane. Liberally reapplied and it still didn’t manage the 20 odd miles home. Has been passed on to my mum, where the clean running and ‘2 miles to the shops maximum’ journeys mean it is well suited.