apropos vs as well as

apropos

• Regarding or concerning. 

• Of an appropriate or pertinent nature. 

• by the way, incidental 

• To the purpose; appropriately. 

• By the way. 

• Timely; at a good time. 

as well as

• In addition to; further to. 

• And, in addition. 

• Used other than figuratively or idiomatically: see as, well.