Mom wants to give a plot to me...should she give it as gift or transfer the registration of the plot ?

My mother had purchased two adjacent plots. On one of the plot she constructed her house with common wall concept and lives with my borther and his wife. The other plot is vacant just next to it. Now she wants to give the vacant plot to me...we are confused as to how to go about it. Should she show it as a gift to me or transfer the plot registration paper on my name. What are the pros and cons in both the cases. Is there any other way she can give me the plot without much hassel and expenses. I have two siblings...who have no issues with this but I want to keep the paper work clear of any misleadings or misunderstandings in future. My mother did not inherit these two plots, she purchased it herself with her own money. My father is no more.

Secondly how long does it take to legally own the plot in my name as I want to immly start constructing house on it.

What are the other points we need to take care of...please guide.