Should I race the Xterra off-ride MTB triathlon in road cycling clip on shoes or my running shoes?

I completed my first road triathlon last week on a road bike with shimano SPD clip ins. I am competing in the Hawaii Xterra mountain Men Tri this weekend and I can’t afford new MTB clip in shoes. Should I use my road clip ins or my running shoes with regular pedals?

Abu Dhabi International Triathlon: Highlights from Race Day

Top male and female elites, Spain’s Eneko Llanos and the uk’s Julie Dibens, made history in the United Arab Emirates’ capital as they clinched the maiden US0000 Abu Dhabi International Triathlon (ADIT) in emphatic fashion, against a stacked field of international elites. Llanos came from behind to win the 223kms ADIT – organised by Abu Dhabi Tourism Authority (ADTA) – and finished with a combined time of 6h34m37 – nearly a minute ahead of second placed Dirk Bockel from Luxemburg. Whilst Dibens – the current Ironman 70.3 and Xterra Triathlon World Champion and 70.3 distance world record holder dominated to clinch a wire-to-wire victory in the female category, her longest ever race.