Depending on your setup, easycap is only limited to composite and s-video input. Some of the sharper easycap video here that you see may be because I'm using s-video cable hence they look almost similar to the Grabber quality but keep in mind that video game console s-video cable are rare in Malaysia and difficult to find one whereas video game console component cable are easier to find in Malaysia. Therefore, if you have easycap and unable to find the console s-video cable, your graphic will not be so sharp as you can only use composite! Grabber allow you to have an alternative option in which is component input where you can buy the console component cable easily.
As for tuning control, I find that Grabber has better adjustment when it comes to contrast, sharpness, color, and brightness than easycap. If in some part of the game where its dark, you can easily adjust the Grabber to be brighter while in easycap, the brightness settings tend to lead to the color appear paler like a shade of white has been applied to it.
When I play game using the capture device, I don't have any antivirus, downloading, or programs running in the background but I'm guessing it should work on your Pentium 1.7 laptop. I still need to know how much RAM and your max display resolution of your laptop before I can confirm. Pm me your laptop specs

Thank you. I do intend to provide as much information on the product I'm selling so you can make a good decision!