Sorry, I must have gotten confused with how Resharper position the parameter info (which is at the top).
Ok, there is a slight difference in terms of Completion Prompt and Parameter Info pop-ups between Actipro and Visual Studio.
When the parameter info is open at the bottom of text, when we launch completion prompt, the completion prompt is shown below the parameter info. This looks fine for both Visual Studio and Actipro.
However, when we put more TABs such that the caret is wider than the parameter info dialog, and when we launch the completion prompt, Actipro places at a weird placement, ie. at where the caret is but a gap down below the parameter info. In Visual studio, the completion prompt is placed nicely beneath the caret (ie, beside the parameter info and there is no gapping down).
Let me know if my textual description is hard to follow, I can email over an attachment with screenshots.