The Granada series is superior IMHO. Not only are the production values and casting better, but any Holmes production stands or falls by it's leading performance. Brett edges it for me because it is him who I visualise when I read the stories. His performances (especially in the first three series) are absolutely perfect and capture the literary Holmes exactly as he is written. He sucks you into his world by sheer personality and the viewer becomes completely involved by what is happening. His later performances suffered due to his very poor health (and some dodgy scripts). Wilmer runs him close, but he is a little too dour to be the perfect Holmes and I also think that his series is hampered by a lack of budget. The cramped sets do not draw one in like the setting in the Granada series and I have found myself admiring the acting rather than simply enjoying the stories, as you can with Brett. Also, Holmes in the books is mostly full of life and energy, Wilmer simply does not fully bring this to the screen and the pace sometimes grinds to a halt. Wilmer's episodes are good, I prefer his version of 'The Specked Band' to Brett's, but overall IMHO the Brett series is the superior version.