The Finals in 87 & 94 were actually quite comparable. Two heavily favored teams who took 3-1 leads. Both of them took Game 5 for granted & gave the other teams' life which they took advantage of. Both Game 7's were low scoring, tight games with all 4 teams afraid to make mistakes.
The only difference in my opinion was the '87 Flyers with Hextall & Keenan were so unlikable. Hextall gave Ken Nilson a nasty slash to the back of his legs at the end of Game 4 that he should've been suspended for. He was such an antagonizing *******.
Edit: I just looked it up. Hextall was actually suspended 8 games for the slash, but not until the start of the 87-88 season.

Typical NHL crap.
In '94 I didn't dislike the Canucks at all before the series started, they were just in our way. Had I been a neutral observer, it would have been riveting watching Bure take over shifts & entire periods. He was just a phenomenal player.
The Flyers were neither an underdog nor a Cinderella team in 1987. They had a rough time making it out of the East [PoW], and they rode Hextall a lot, but they were not an underdog in sense of the story. Although they might have been a slight underdog in the betting line.
Anyway, in regard to the OP, there are many great playoffs, but I don't really see the comparison between the 1987 finals and the 1994 finals at all.
Was he trying to allude to the finals being the same because of "the save" by Richter 1994 and Hextall winning the Conn Smythe on the losing team in 1987?
Hextall carried the Flyers in the last 2 rounds, and although Richter was fantastic and solidified himself as an all time Ranger great that year, I would have put him at most at 4th in running for Conn Smythe that year if not lower behind at the very least Leetch, Messier, Bure, Linden, and maybe even McLean.
I mean if let's say the Rangers ended up losing game 7 to Vancouver, yet everyone played the same besides that, Richter would definitely not have won the Conn Smythe for the losing team as Hextall did in 1987.
Furthermore, in regard to NHL lore, Hextall's 1987 performance is definitely commendable and probably a neat find for someone perusing stats one day, but in general, the Flyers would be remembered for the broad street bullies in the 70s, and the Oilers for the 80s.
I've quite honestly never remotely even hear a comparison between those two series.
Anyway, It just sounds like sour grapes by your Fly-hairs friend because they couldn't punch their way to a cup in the late 80s.
1994 was definitely one of the best storylines of the modern era.