The only difference between the new and the original 95LX is the amount of internal RAM memory. The original 95LX had 512K of RAM. The new HP 95LX has 1MB (1,024K) of RAM.
You can split the RAM memory of both 95LXs between system RAM (the RAM you use to run application programs) and RAM disk (for storing files). The new 95LX can be configured for a maximum of 626K of system RAM (still leaving a minimum 398K of RAM disk for storing files).