It's similar yes - my point was more than I'm an example of someone that needs Paddington specifically due to the Bakerloo piece. So Hex still works as a viable option. Crossrail of course is also one.
If Paddington wasn't convenient or a relevant node, nobody would get off a Crossrail train or a Bakerloo (e.g. from Oxford Circus) to grab the Express.
For me, depends on who's paying, me or work - but also wait time, terminal (for t5 HEx is better at 4tph, t2/3 Crossrail is TUAG on CR - I'm generally a Delta/Virgin person so I'll be doing Liz next week on my way to NYC.