I think that Red Army team was pretty good... see:
https://en.wikipedia.org/wiki/Super_Series#Moscow_Central_Red_Army_versus_the_NHL_4
Moscow Central Red Army versus the NHL
Red Army won a series against NHL teams with 4 wins, 1 tie, and 2 losses. The scores were:
Red Army tied the Quebec Nordiques 5 to 5
Red Army beat the New York Islanders 3 to 2
Red Army beat the Boston Bruins 5 to 4
Red Army beat the New Jersey Devils 5 to 0
Pittsburgh Penguins beat the Red Army 4 to 2
Red Army beat the Hartford Whalers 6 to 3
Buffalo Sabres beat the Red Army 6 to 5
They only lost to Pittsburgh and Buffalo that series
The other team was Dynamo Riga:
Dynamo Riga versus NHL
The NHL teams won a series against Dynamo Riga with 4 wins, 1 tie, 2 losses. The scores were:
Dynamo Riga tied the Calgary Flames 2 to 2 (Perry Berezan, Hakan Loob) (Alexander Kerch, Alexander Belyavsky)
Edmonton Oilers beat Dynamo Riga 2 to 1
Vancouver Canucks beat Dynamo Riga 6 to 1
Dynamo Riga beat Los Angeles Kings 5 to 3
Chicago Blackhawks beat Dynamo Riga 4 to 1
St. Louis Blues beat Dynamo Riga 5 to 0
Dynamo Riga beat Minnesota North Stars 2 to 1
Washington Capitals beat Dynamo Riga 2 to 1 (19 September 1989 in Riga)