Both are rock 'n' roll heavyweights of legendary status, having ruled the 1970s and 1980s with their inimitable, wicked sounds.
At one point, in 2003, the bands in question, Aerosmith and Kiss, were even tour mates.
Of late, though, there's been some friction, with Aerosmith's pouty-lipped frontman Steven Tyler - fresh off his tenure as a judge on American Idol - describing his peers as a "comic-book rock band (with) spackled faces (and) a couple of hits".
The New York City outfit's singer-guitarist Paul Stanley retaliated by gleefully recalling memories of people walking out during Aerosmith's performance on their co-headlining tour.
Personal issues aside, the music fan will want to know which band has held up better over the years.
If their latest offerings are anything to go by, we'd have to say that they're on pretty equal footing.
Take Aerosmith's 15th album, Music From Another Dimension!, which has plenty of parallels to the Boston band's past works.
It comes more than a decade after their last record of all-new material - Just Push Play (2001) - and an extremely turbulent past couple of years for the quintet, which comprises Tyler, guitarists Joe Perry and Brad Whitford, bassist Tom Hamilton and drummer Joey Kramer.