Ah, could be, but the only way to know for sure is to ask Google (and all other search engines) exactly how they deal with it, so if you don't need the pages or links on/to those pages why depend on an external system, that may change at some time in the future, to do what you think they should when you can just tell them you intentionally removed the page(s) and they should remove all related references?
Another way to look at it is:
robots.txt block = "Hey, don't go in here any more." (What Google and each individual engine does with the info they already have is up to them in this case.)
410 Gone = "We removed this, so don't talk about it, don't send people to it, don't use the information from it, don't index it. It's Permanently Removed; Gone."
Which is more accurate for your situation?
That's the one I'd use personally.