There’s also a Google and Microsoft office in Pittsburg, but I don’t think we’d go assuming that CMU is a regional school because of that, nor that every CMU grad goes to the Pittsburg office. And focusing on those two misses that the companies I highlighted are mostly based on the west coast.
If you look even on Microsoft’s website for new grads, there are no open positions in the Austin office - most are at the main office in Redmond.
Looking at these lists of outcomes they overlap quite a bit and are both star-studded. I just can’t see how you’d make the argument that recruiting will be that much different. Speaking as someone who works for one of those known tech companies, I can tell you that recruiting will not care in the slightest between the name of either of these schools.