Lots of groups competed with Skid Row, mainly Crystal & Fairlight, during their ‘glory years’. But there were quite a few dud-releases, usually games that were rushed out because another group was known to have the original… they would release their version on the boards either knowing it didn’t work or simply upload disk 2 of 2 everywhere to buy them time to finish a working disk 1, and release a fix later if required – a scan of any old BBS file-listing from a major scene board of the era will show you this.
Having said that, there was a good 1-2 year spell when 75% of the major games were released first by Skid Row in a working state 🙂 A group that had the best suppliers in Europe (SSR) and a collection of very good/fast/sometimes-both crackers (Eurosoft, Blackhawk, FFC, Special Agent, others that I forget) was always going to be a force to reckon with!