Yup. You’re reading that right. Onslaught and Blood & Gears are the same weekend this year so table top gamers have a tough choice to make. That being said, there are clear differences between the two. Where B&G is strictly Warmachine; Onslaught is host to 10 different games systems (on its 10th anniversary, no less).
Check out the lineup of games this year:
Age of Sigmar
Warhammer 40K (part 2)