Aweber vs. Convert Kit

I’m listening to Brooke’s “How To Be a Life Coach” podcast and following her 14 steps to creating a coaching practice (huge help!). She recommends Aweber but I know that Convert Kit has come on the scene in the past few years and seems to be a popular option, offers similar features and does not charge for duplicate subscribers. I’m wondering if this is a viable option or if Aweber is still the way to go? TIA!