TSPP, even though I have owned both.
Solid game for small or large collections.
RS is a better diversified WMS collection game.
I still have RS I bought in 2002 (as it is a prototype, and I know I would never find another), but I would buy another TSPP if it was collector quality.
Little known fact:
Did you know TSPP has come full circle as a home use pinball machine?
In 2003 (and small sequent additional runs later) the game was popular and bought for homes.
Then fell out of favor from collectors in the mid 2000s due to the drought, many of which were sold back to the original dealers.
The interest came back starting around 2010-2012 due to new collectors recognizing the ruleset depth.
Those that argue may forget that even though RS has more depth than many machines of THAT era, LOTR brought more attention to coding in 2004 from players, although TSPP was praised beforehand.
Extra coding was considered a "bonus" in 2003, operators did not care.
A lot of people did not even know TSPP had two wizard modes, or played enough of the game to see most of the features including home use games.
Tournament players learned.
Home use "hardcore" collectors figured the game out eventually.
Many people still do not know that RS has more modes than most modern games.
The prototype coding had even more.
However, there are very few games that can outperform the final ruleset of TSPP in variety, completion, and being streamlined into something that makes logical sense.
Anyone that states "everybody" recognizes the depth of TSPP is BS.
Most operators did not even realize all the features that were added when the code was finalized.
The ruleset took a lot of time before it was enthusiast documented on all the hidden features and secrets that were in the game.