Have or had all three; vintage WP portable/convertible (since moved on), Hoover TT and Maytag wringer still remain. Each have their own niche IMHO, but in terms of getting large amounts of laundry done quickly, and if those items are big, the Maytag wins.
Cannot do queen or king sized sheets in the Hoover TT. Nor really blankets, quilts, or other bulky items. Maytag wringer handles those things easily. Yes, it's a bit of work, but far better than dealing with TT, and certainly none of the larger items would fit well in WP portable.