Couple of xbox 360 questions

[Scouse]

What's the difference between 1080i and 1080p display wise?

&

Should there be a noticable difference between using a HD lead and a HDMi lead?

[T1z3R]

1080i and 1080p? What do both i and p mean?
These formats indicate the number of horizontal lines the transmission format uses along (denoted by the number) and the picture display method being used (indicated by the letter.

* i stands for Interlaced
* p stands for Progressive Scan

Why 1080p is theoretically better than 1080i ?
Basically, 1080i -- the former king of the HDTV hill, actually boasts an identical 1,920x1,080 pixels resolution but conveys the images in an interlaced (i) format (the i in 1080i). In a tube-based television, otherwise known as a CRT, 1080i sources get "painted" on the screen sequentially: the odd-numbered lines of resolution appear on your screen first, followed by the even-numbered lines--all within 1/30 of a second.

An Interlaced Image
An Interlaced Image

While, the Progressive-scan (p) formats such as 480p, 720p, and 1080p (1,920 x 1,080) convey all of the lines of resolution sequentially in a single pass, which makes for a smoother, cleaner image, especially with sports and other motion-intensive content. As opposed to tubes, microdisplays (DLP, LCoS, and LCD rear-projection) and other fixed-pixel TVs, including plasma and LCD flat-panel, are inherently progressive in nature, so when the incoming source is interlaced, as 1080i is, they convert it to progressive scan for display.

taken from here.

when you say HD cable do you mean the component video cable with the switch on it? if you use it in component mode it should technically be the same as using HDMI.
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