The trailing digits do have significance and indicate a commonality in platform and purpose. With the advent of the appliance platform, there are now some new naming conventions that indicate that a server is a Linux appliance that comes preloaded with a specific version of an application (e.g., CUCM, CUC). For example, you may see servers with model numbers that end in UCA1A, UCB1, UCB1A, UCB2, and so forth. IPC servers are somewhat generically used - CUCM, MP, UCCX, and etc. Servers with the ECS indicator are configured specifically for Unity (and Unity Speech Connect); however, that doesn't exclude them from being compatible with other applications such as Unity Connection. However, this is not always a guarantee so you always need to double check the hardware compatibility guide for the software and version you plan to install.
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...