Why does the Gemara sometimes say רמי instead of ורמניהי?

QUESTION: I understand that the Aramaic root רם means to “throw” and therefore verbs derived from that root are used when the Gemara “throws” two teachings on top of each other in order to illustrate a contradiction between them. But why is that the Gemara usually uses the word ורמינהו to ask such questions, but less commonly uses the word רמי to do the same thing? Do these two words means exactly the same thing or not?