The word you used...'rather'...seem to imply that it's only possible to do EITHER one or the other. I disagree with that.Dwell on what's happening to you rather than what they are doing and your environment...
That’s pretty broad statement, and speculative at best...you *wil* loose.
If a guy who’s 7 foot tall, weighs 150kgs and uses an internal TO external (i.e. both) type of focusing... and he fights a guy who is 4 foot tall weighs 40kgs and uses external focusing. Who’s going to win is not really a matter saying: "Hey he uses external focusing, so he *will* win!"
There's many factors that dictate who will win.