I will say hat the Omega is very capable when it is used for nugget hunting. perhaps not as 'hot' as a specific models operating at a higher frequency, but decent nonetheless.
I guess the there might be some basic platform function similarities between a couple of the Teknetics models and the BH Platinum, but there are significant differences between the Platinum and the Omega 8000, especially for the small difference in suggested retail price. I think the Omega has an 'edge' for nugget hunting over the Platinum because while they both offer a Ground Grab function, they suggest different steps to achieve the ground balance. Additionally, the Omega 8000 has a Ground Error graph and an Fe[sub]3[/sub] O[sub]4[/sub] bar graph to alert you to ground conditions and changes, plus the Omega 8000 has the manual ability to increase or decrease the GB setting and "'fine tune" it for the conditions at hand.
Combine this with the fact that the Platinum's All Metal mode is a static operation and the Omega'8000 features an Auto-Tune All Metal mode and most would agree that there are significant differences between the two models.
In then end, however, your results do demonstrate the fact that the First Texas products in that 7.8 kHz range are capable of finding raw gold. You didn't mention if you were using the stock 8" or one of the accessory coils. Care to fill us in?
Happy Hunting,
Monte