Lukaku moved to Chelsea from Anderlecht in 2011 for a fee which could rise to £18 million with add-ons, but has since struggled to fight his way into the first team at Stamford Bridge.
This led to the 19-year-old joining the Baggies on a season-long loan deal this term, a move which Mirallas believes can only benefit his compatriot.
“Romelu is a big lad and is very strong,” Mirallas told the Liverpool Echo. “In one-to-one aerial battles and individual battles, he will really tough it out.
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Mirallas also believes that the time spent on the sidelines at Chelsea will push the striker on to bigger things, and expects him to star in the Premier League this season.
“The biggest thing about him is that he’s hungry for success. He wants to live every moment and almost eat up every game. He spent a year not playing, so now he is so keen to succeed," he added.
“He already has a goal this season and the fact he’s playing games already shows it’s going well for him. But let’s hope it doesn’t go so well on Saturday for him.”
Mirallas sealed his own move to the Premier League from Olympiakos last week, and went on to score his first two goals for the Toffees during his home debut against Leyton Orient on Wednesday evening.
And the 24-year-old is already convinced he made the right choice in joining the Goodison Park outfit, praising the support he has received from manager David Moyes.
“Ever since I’ve been a youngster it’s about getting support," he added. "And ever since I met him the manager [Moyes] has set his stall out to get me at the club.
“He made it clear he wanted me. Other clubs were interested, but I’m happy I am here.”