Hi Zola. Well these are two very different strategies. The LifeStrategy funds are cheap compared with most actively managed funds but they are more expensive than the cheapest trackers. However what you are paying for here is the automatic geographical and asset allocation rebalancing. Your LifeStrategy 80 fund is invested globally and is invested in bonds. It’s not really fair to compare it to a US only fund.
Are you thinking of switching out of your LifeStrategy 80 into this fund or adding it to compliment it? If it’s the former will you also invest in Japan, UK, Europe etc as well as Bond funds to diversify you? If it’s the latter all you are effectively doing is amending your geographical allocation with a heavier US weighting. Is this what you are wanting to achieve?