As OP to this thread, and past owner of The Shadow (had to sell for financial reason)...I am now a current owner of White Water for about 3 weeks.
The Shadow: what other posted above are all very accurate. Once Luppin Rules are put in place, the game becomes more accessible and enjoyable...but not easier. I hope to one again someday.
White Water: my first impression was that the game was fairly easy. I was staying away from the entire right side of the playfield and hammering away No Way Out, up to third flipper, and playing White Water multiball a lot.
Then I wanted to get to Vacation Jackpot, and the game started kicking my tail. Just getting to Wet Willie’s is tough enough. Getting the rest seems daunting at this point. I’m just looking forward to maybe completing Wet Willie someday.
White Water forces you to hit shots all over the playfield which is great. The humor is fantastic. The music does get repetitive if one isn’t advancing rafts, however I don’t see the music as negative like others do. Like many other 90s Bally Williams games, once it’s “wound up” it gets really exciting.
Only time will tell how long White Water will hold my interest. Early returns are very favorable. It compliments my other games (WW, TZ, WCS94, T2) very well. Best answers of this thread are “get both”.