(Per the Toys R Us website):
That Little Tykes set is nice and good... I have friends that have that and it's great.
But yes, when your kids are older.... over say 6 years old.... when they are taller & heavier... you'd want to get a set that is for older kids. Because their height/length will outgrown the proportions of the set.
But, this Little Tykes set will last a long time... and when your daughter is 5+ years old... your (eventual) younger child/baby, will be at that age where THIS same Little Tykes set will be appropriate for him/her. There will be an "age" gap... in the type of outdoor apparatus's they can use. SO... actually, by the time your eldest daughter is 5+ years old... you MAY decide to "keep" the Little Tykes set... for the younger child, still. THUS, there may be 2 outdoor apparatus's for "both" children. Depending on their age gap.... and you can never really "plan" the age gap between children.
As an example: we have the "Step 2" Kangaroo Climber (from Toys R Us) in our yard, which we got for my eldest child when she was a toddler... then 4 years later we had a son. NOW at their ages (2.75 yrs. old and 6.75 years old) they BOTH can still play on it, although my daughter is naturally too heavy/tall for it per her age. But the apparatus does accommodate them both & is very strong. So, we still keep it in our yard. And they both have fun with it. Still.
As with anytime when you have more than 1 kid... you generally can "keep" the equipment you already have... for the newer/younger child... because after the eldest child has outgrown it, it will be perfect for the younger child.
The Little Tykes Clubhouse Swing Set to me, looks more fun.
But kids have fun with both configurations....
ALSO, since your current child is only not even 1 years old... make sure you note the "recommended ages" of the apparatus... at this young age, a child can't "swing" by themselves on a swing or balance properly on it yet. So, they need a swing that has the waist bar across it... for example.
Most kids, even at 2 years old, can't really "swing" by themselves on a swing or balance or hang on to it safely enough yet... so... you might want to consider what kind of "swing" you get.
Once you do have 2 kids.... parents usually KEEP what they already have... so that the younger child will still have something to play with or use, and even if it is outgrown by the older child, it will be still useful for the younger child.
ALSO, try to get something gender neutral... with me, we had a girl then had a boy. But for their outdoor things, they both can use it since outdoor things tend to be gender neutral, and therefore you get more for your money.
Good luck,
Susan