You wrote who is the Savior between Christ and keeping commandments.
Why do you need to prove to anyone that Jesus Christ is the saviour?
Is anyone doubting that Christ is the Saviour?
To believe in Christ is to follow his commandments.
Those who truly believe in Christ and those who know Christ, and those who trust in Christ will follow his commandments.
There are many who claim to believe but the do not. Their actions, lifestyle, works do not follow the teachings of Christ. So their belief is worthless
Therefore to believe IS THE SAME THING AS following his commandments.
Belief is from the heart and belief is transformed into action and good works.
King James Version
1Jn_2:3 And hereby we do know that we know him, if we keep his commandments.
1Jn_2:4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
1Jn_3:22 And whatsoever we ask, we receive of him, because we keep his commandments, and do those things that are pleasing in his sight.
1Jn_3:24 And he that keepeth his commandments dwelleth in him, and he in him. And hereby we know that he abideth in us, by the Spirit which he hath given us.
1Jn_5:2 By this we know that we love the children of God, when we love God, and keep his commandments.
1Jn_5:3 For this is the love of God, that we keep his commandments: and his commandments are not grievous.
2Jn_1:6 And this is love, that we walk after his commandments. This is the commandment, That, as ye have heard from the beginning, ye should walk in it.
Rev_22:14 Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.