regex interpolation of array

[Richard Hainsworth]

I was playing with a regex and array interpolation.

From the documentation I thought the following comparisons would be the 
same, but they are not.

What am I missing?

my @W = <perl weekly challenge with some extra things>;
my $S = 'perlchallengeextrathingswithweeklysome' ; #randomly concatenate the words 
without spaces say 'yes' if $S ~~ / $<sol>=( {@W[3] }) /;
say $<sol>;
my $sol = @W[3]; # with
say 'yes' if $S ~~ / $<sol>=( $sol ) /;
say $<sol>;

<response>
yes
｢｣
yes
｢with｣