Looking to replace an old 9-speed cassette (SLX) which is long out of production and unavailable now. I see on Amazon some other Shimano 9-speed cassettes (Alivio or Sora as it's a commuter bike now), Sunrace, and Lanxuanr.
Does it make any difference? They seem to all range in cost from 25 to 35 GBP. I just want a smooth ride and no gear jumping.
The rear derailleur is a Shimano XT and so it the crankshaft and front rings, and shifters are SLX (all year 2011).