Hello - need some prelim sizing info: I'm 5'8"

I've drank the "Scott Koolaid" I like to call it. I own 2 Scott bikes already:

- Scott Speedster S40 in a 52 cm frame

- Scott Sportser P3 (hybrid) in a Small (52 cm frame) for leisure rides with my husband

These are both men's bikes.

I'm looking to get into triathlons and looking for a starter bike. I've found a second-hand Scott Contessa CR1 Pro for sale in a City 8 hours away from me (I live in a remote Canadian city where we don't have a lot of bike shops).

The Contessa has a frame size 54 cm.

I've been trying to research the Scott men's vs women's sizing and if this women's 54 cm frame will work for me, but I'm getting nowhere.

Can anyone offer some insight on the sizing?

Like I said, its a beginner bike so if I'm looking to upgrade in a few years, I'll have no trouble re-selling it in my home city. We don't have a lot of bikes here, and second-hand Scott's get snapped up as soon as they go up for sale!

Thanks for your help!