I got S1 professional as an upgrade from Artist (that was a throw in on an old interface) on one of these advertised deals, for $100 specifically for that feature (that and I needed a cross Mac/Windows platform for stuff I do at my church), but I use Sonar pretty much exclusively for everything else.
You can sort of do this in Sonar, but it's a lot more painstaking. One thing I'd like to see Sonar pickup that S1 has (and you did a great NAMM presentation on, that's on your YT site) is album mastering and ability to throw in tracks and order them and reorder them, etc. With the decline of physical media and an emphasis towards singles instead of albums, I'm finding this less and less of an issue with each passing year. The biggest limitation in Sonar is CD production (e.g., CD text and such). If you're doing multi-point editing for broadcast you'll need something like Sequoia, but that's major $$$ for a capability you likely won't use for mastering music. you can add aux or submix buses (and indeed. in fact, there are three other track channel types: aux buses, submix buses and vca fader channels. like most daws, samplitude has other track types besides standard audio and instrument tracks.
Throw it in a channel, create a screen set that's optimized for mastering, and you can take care of most mastering situations. Samplitude pro x2’s aux buses, submix buses and vcas add up to a powerful and flexible routing system. Ozone 5 costs $249 and has any "missing" mastering plug-ins and diagnostics tools. Anderton Samplitude is a fine program, but I've been doing more and more mastering in Sonar.