After Forever I find more appealing than an Epica for a couple reasons.
#1, I notice Floor Jansen balances her voice better between the operatic and straight ahead rock letting the rock roll more than the theater (you can hear the two in 'Equally Destructive'). And while we are on the topic of the voices, After Forever bring in the low end death metal snarls (which are better than most and have personality, kinda remind of Peter from Hypocrisy) at excellent times without it being overpowering, adding depth and attention to the words and music nicely on a track like 'Withering Time' and the scorcher 'De – Energized' where I am really digging the execution and level of aggression.
#2, After Forever’s arrangements using the male/female tones within a song evoke more excitement than the at times overly progressive and more layered Opeth-ish compositions that Epica create (which get boring to me).
Like here, 'Transitory' gives the male voice the floor and it carries the aggressive track well with plenty of power and punch. Also, there is more Nightwish in After Forever (an excellent quality I might add) on a song like 'Energize Me' where the chorus and melody are obviously the focus. I like the song along with 'Transitory”.
After Forever appear to base each song in riffs and a melody line while allowing the progressive tendencies to come more natural and intermittently. I like this record. It rocks from beginning to end with fist in the air metal songs and as a bonus there is a duet between Floor and Doro Pesch on the song 'Who I Am'.