Need wording opinion

There are two wording choices that are almost the same and some people may not notice the difference but I need your opinions.

#1 Mr. and Mrs. Bride's Parents
and
Mr. and Mrs. Groom's Parents
request the honour of your presence
at the Nuptial Mass uniting their children

Bride

and

Groom

in the Sacrament of Holy Matrimony

details, details, details


or


#2


Mr. and Mrs. Bride's Parents

and

Mr. and Mrs. Groom's Parents

request the honour of your presence
at the Nuptial Mass at which their children


Bride


and


Groom


will be united in the Sacrament of Holy Matrimony


details details details.




Such a slight difference, but I don't know

numeral uno