(Image credit: Future) This week, Garmin launched two new running watches — the Forerunner 70 and the Forerunner 170, both aimed at beginner runners looking to enhance their training. But what are the main differences between the two watches, and which should you pick? I’ve just started testing the two new watches, and the reviews will be coming soon on Tom’s Guide, but for now, let’s dive into the similarities and differences below. Garmin Forerunner 70 vs Garmin Forerunner 170: Price The Garmin Forerunner 70 and Garmin Forerunner 170 will both be available to buy on May 15. There’s a slight difference in price between the two watches: the Garmin Forerunner 70 is the more affordable watch, costing $249/£219. The Forerunner 170 comes in two varieties, one with onboard storage for music, priced at $349/£299, and one without, for $299/£259. Garmin Forerunner 70 vs Garmin Forerunner 170: Design and battery life The Forerunner 70 and Forerunner 170 look very similar.…