[Boromir88]

I believe there is a mention that Aragorn was taller than Boromir, but Boromir was stronger.

Although the line of Stewards in Gondor was separate from their line of Kings (Anarion's line) that Snowdog mentions became mingled. Also, Boromir could be an outlier as someone who only delighted in 'arms' and 'battles.'

Edit:

PS also remembering that Boromir's mother was Finduilas from Dol Amroth's royal line. So, there was some Numenorean and Elvish descent in there. Although it's interesting that Tolkien writes the Numenorean blood was perhaps 'more pure' in Faramir than Boromir. And that Faramir resembled Denethor in that regard more than Boromir.