Please. That matchup wont happen in this country for another decade, much less this region. Its like saying "Well, the Pope sold out foxboro...."
I'm not sure you'd get a very balanced view from this group, but, whatever. Not sure what route you drive, but Gillette is 23 miles from the Back Bay. For comparison, Home Depot Center is 16 miles from downtown LA and Red Bull Arena is 13 miles from Columbus Circle. Clearly Gillette is farther, but they're all in the same ballpark, and with typically worse traffic in NY/NJ and LA, the "drive" to each of them is likely to be no easier than a drive to Gillette from downtown Boston. Absolutely, that's clearly a major differentiator. But, the point here is that both of those teams aren't really significantly closer to an urban core than Gillette is, regardless of whether their sites are more "urban" or not. They are still referred to as the LA Galaxy and NY Red Bulls, not the Carson Galaxy or the Harrison or Newark Red Bulls. What's the coke or pepsi in this situation? Your choice is to watch live men's soccer at the pro level or not - or move, or travel 4+ hours to see another team, or watch lower-level, ...