Vasriva1,   This question would be better directed to sales, but with that being said the easiest way to consider it is the generational identifier in each. Such as the R610 the latest version released would be the R650, which the R630 is a predecessor to also.  So from your listed models, the latest versions would the R350, R450, R650, R750, and the C6520/C6525.   Let me know if this helps.
Hi, We have a few dell servers in our setup that are already EOL/EOSL or about to be. For planning and setup of new servers, a 'proposed new model' list is to be prepared. Does dell share any such information about which newer model would be replacing this retiring model and what would be its lifespan etc. I know that a list of all EOSL models is available, but is there any new replacement model list too ? Or even if this information is available on individual models' pages?  Some of the models that we have are - Poweredge R610, R710, R330, R430, C6100, R630, R640, R310...
Proposed new models of dell servers.