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.
Sometimes when you use recipes from old cookbooks, they can seem a bit “tone-deaf” when it comes to modern-day sensibilities about race and culture. Despite a questionable name, 11-36: Hong Kong Shrimp contains many ingredients commonly found in Chinese food.
I love the porcelain bowls they served the example dish in. The wooden chopsticks are also a great touch. What a great photo!