What causes a lot of confusion with the Helix units is understanding the capabilities of the particular unit that you have. MHZ(Mega) units are the best. Higher frequency and slower speed equal better image quality. All non Mega Helix G1 and G2 units are not the same. The Helix 5, and 7 do SI and DI at 455 kHz. Helix 9 out of the box will do 455 KHZ and 800 KHZ if you upgrade to the HDSI transducer. The HDSI transducer also improves the 5 and 7 somewhat because of the larger element you get a better image even though still running 455 KHZ. Helix 10 and above are 800 KHZ units out of the box. Notice the speeds of the images you're comparing with. If the boat speed is around .5 or less probably shot from a kayak. Yes, a bass boat can go that slow but usually, the movement of the trolling motor degrades the image a little. Everyone always asks how to get the great images. Start with factory defaults and play with your SI range and sensitivity to get your best image. I hope this helps.