Yes, I would say that if want to emulate what you're doing with Collections in S...

maccman on June 7, 2011 | parent | context | favorite | on: Hello Backbone.js - A step-by-step tutorial

Yes, I would say that if want to emulate what you're doing with Collections in Spine, it's just a case of subclassing the model. This makes more sense imho, and may lead to even further code re-use.