I know there's no tie but they look a lot alike.

Not really, there is only a minimal similarity, if any at all. And yeah there are no ties.

They look alike? Ehm... Not really.

 

The only resemblance between those two are the head with the three spikes on it.

Xion's armor are suppose to resemble Sora's KH1 outfit, and obviously Eraqus Armor does not in any way resemble Sora's KH1 outfit.

 

Master Eraqus' Armor: http://images4.wikia.nocookie.net/__cb20101120182660/kingdomhearts/images/e/ec/Eraqus_in_Armor.png

Xion's Armor: http://images1.wikia.nocookie.net/__cb20100401074419/kingdomhearts/images/f/f6/Xion_Armor_4.png

I say somewhat, but not really

they're both armor, but thats pretty much the only similarity.

yep it is

Well the spikes on the helmets.

Pretty much what everyone has been saying; just the helmet spikes.

They look alike? Ehm... Not really.

 

The only resemblance between those two are the head with the three spikes on it.

Xion's armor are suppose to resemble Sora's KH1 outfit, and obviously Eraqus Armor does not in any way resemble Sora's KH1 outfit.

 

Master Eraqus' Armor: http://images4.wikia.nocookie.net/__cb20101120182660/kingdomhearts/images/e/ec/Eraqus_in_Armor.png

Xion's Armor: http://images1.wikia.nocookie.net/__cb20100401074419/kingdomhearts/images/f/f6/Xion_Armor_4.png

 

Not only his KH1 outfit, but tsome of her forms resemble his KH2 forms and outfit as well^^.

Not really. Only the head spikes look alike, otherwise they are completely different

It looks utterly identical I hear Eraqus is planning on filling a copyright complaint