I am planning to replace the cassette on my bike. Currently it has a Sunrace CSMS1-TAV 10 speed 11-34T. Unfortunately, this exact model seems that is not available anymore but very similar ones are available, such as CSMX0 or CSMS1-TAW. I wanted to ask if there is a compatibility problem between these ones. Looking at the information on Sunrace website I can see that some characteristics don't match.
First, the number of teeth I am pretty sure it's not a problem, the largest cog has more teeth but that will just affect the ratios and maybe require longer chain, but I just wanted to check that my thinking is correct.
Second, and what I am more concerned about since I don't really know what it means, it's the "Sprockets on spider" spec. What is this exactly? Also, will it cause a problem if it's not the same as the original cassette?
Lastly, and assuming they are compatible, what are the differences between the CSMX0 and CSMS1, I can see that the first one is slightly more expensive but is it better in some way? Is it worth getting the slightly more expensive one?
Thank you in advance for your help