I have a decent amount of experience with both, but obviously a lot more with the Speedio since I own one.
This is a very Ford v. Chevy argument. For most job shop, in-house production, and garage shops I think the Speedio is the better choice. The C-00 control is extremely capable and way nicer to use on an everyday basis, these machines features a bunch of great operator details (the door/feed hold behavior, for example), and support from Yamazen is world class. You also have the 16k spindle option, which I think is more flexible than either the 10k or the 24k Robodrill options. Not for nothing, but in facilities that have Robodrills and Speedios, the Speedios are typically 5-10% faster.
Robodrills come with very advanced Fanuc controls, drives, and servos. It is essentially a 3 axis VMC outfitted with the same guts as a very nice 5 axis mill. I think these machines have superior motion control and are the clearly better choice if you have parts with a lot of intensive surfacing work - medical implants, wet-area aerospace, turbines, molds, etc. The problem with the Robodrill is that you're going to pay for all that capability, and unless you need it for that class of parts, the ROI sucks.
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