Note: I don't want to insult anyone here nor do I want to continue this off-topic. (In my opinion it's not that off-topic, but yeah)
I just want to point out some things.
First of all: In essence they are totally different, but also totally the same!
Here's why.
In TTRR you only have 3 chances to win the game, in BnG you have INFINITE chances to win the game.
To compare TTRR and BnG you either would need to have only 3 turns in BnG or set the amount of HP to 50 or at least make 16 tries on a TTRR game (both teams use 2 Teams of 8 worms for example). TTRR is a contest, you have 3 turns, make the best of it, BnG is a lot more tactics (in TuS, a2b is a different story since there are no normal conditions applied), taking advantage of the terrain (lower angle shots for less f@#! ups while still avoiding sitters).
And in terms of cheap play, there is also an actual 'lame' strategy to win TTRR/RR games, it's called pole extensions to move up all walls, most short horizontal parts it's comparable to those low angle shots that bounce a bit before exploding NEAR your enemy, sure you won't get 40+ hits all the time, but you will hit more often, just like you will get to finish most of the time with pole/rope extensions roping in TTRR. The skilled player can move faster but can also f@#! up more often. Mablak CAN lose vs. a worse TTRR player if Mablak goes for the best roping he has, Komodo CAN lose vs. a worse BnG player (in TuS League) if Komodo goes for his best shots while the other player goes for the 'lame' (I would call them safe) shots.
So in my opinion both schemes are skillful and both have it's value, and yeah both even have cheap play available.
Why do you wonder TTRR challenges have better times than actually live games on W:A Tus? Why are there almost always never best times uploaded from replays other than offline? People rope better when they have infinite tries, it's just the difference that in BnG you either have so called good shots (LG, Zook, Bank shots) or so called lame shots (low angle with bounce to enemy) In RR you can chose if you want to play safe or fast and more risky without risking your good name. Both LOOK equally nice, but in essence it's the same.
Just the community made up big walls for BnG about nice/cheap play while in RR noone complains to Mablak if he wins a map with 45 seconds instead of 39 what he usually can. But everyone would complain to Komodo if he chooses to play safe.That's my view.
Edit: And one more thing that I forgot to add:
What would you say if you win a BnG match because of one awesome shot? And after that you never hit again. It would suck!
What would you say if you win a TTRR game with 3 not so good turns while your opponent made the map's fastest time at that given time? It would suck!
Their mechanic is different. TTRR is just about one turn, BnG is still losable even after 2-3 awesome turns. If you do an awesome turn in TTRR you are safe while you are not in BnG.
So if you want to compare them take into consideration that 1 turn can make you win RR while BnG takes 10-12 good turns and the opponent has an option to interrupt your awesome shots with moving your worm. In TTRR your opponent has no direct impact on you, just that if you know your opponent has xy time you have to move faster than that. It's a mental thing.