What is the difference of getting CON-SNT-SMS-1 instead of CON-SNT-2960S4FS and CON-SNT-2964STL?
As per my knowledge CON-SNT-SMS-1 is for the SMS tool. I hope your purchased 2900 switch. So you can go with that. Even if you go through the link. It show manufacturing part as SMS in the second link. So always you have to choose your right model for your contract.
Please do rate if the given information helps.