Simply Delicious has made numerous attempts at Chinese-American cuisine, and we can add 1-15: Chinese Spring Rolls to that list as well. There’s some interesting history behind the terms spring roll and egg roll–it goes much deeper than just what the wrapper is made of.
The terms are used interchangeably here, and seemingly in most other places as well. The biggest takeaway from the spring vs. egg roll debate is that spring rolls are originally from China, but have been Americanized along the way (while egg rolls were always American).
They tend to have a thinner wrapper than egg rolls, and are often also associated with the transparent rice paper rolls you tend to see in Vietnamese and Thai restaurants.